Crossword Genius

It joins another for a breather (7)

Ross

I believe the answer is:

nostril

I'm a little stuck... Click here to teach me more about this clue!

'a breather' is the definition.
(I've seen this before)

'it joins another' is the wordplay.
I cannot really understand how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found within the answer.
'another' could be 'r' (I've seen this in other clues) and 'r' is found in the answer.
This explanation may well be incorrect...

'for' acts as a link.

Can you help me to learn more?

(Other definitions for nostril that I've seen before include "Part of nose" , "A hole in the head" , "Breathing space" , "Nasal opening" , "Breathing aperture" .)

I've seen this clue in The Telegraph, The Globe and Mail and The Guardian.
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